LionFish says......
Its funny how everybody who mentions setting up an aggressive tank always wants to know if they can keep an Emperor Angel. But, like I always say, they need at least a 120 gallon to thrive and are very prone to diseases, especially ick. They really aren't good to go with triggers and lions anyways. You could have many kinds of fish in an 80 but most people would probably tell you to get a Lionfish, trigger, and eel. But you can also think about getting a wrasse, possibly the Harlequin Tusk, or Hamlets or Puffers, and really I could go on for awhile but those are basic fish for aggressive tanks. Of course you cant fit all of them in an 80 but you could pick from 3 of them.